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Vertiv / DC Power Systems (-48V)

NetSure 731 CC2 Equipment information & support

The Vertiv NetSure 731 CC2 is a carrier-grade indoor DC power system engineered for telecom central offices and enterprise data centers. Housing high-capacity AC/DC distribution, an M830B intelligent controller, and up to 18 high-efficiency R48-3500e3/R48-4000e rectifier slots, it delivers up to 900A of clean -48Vdc power in a single standardized rack.

Equipment information

Brand
Vertiv
Equipment model
NetSure 731 CC2
Equipment type
DC Power Systems (-48V)
Controller / software version
Confirm against the installed equipment
View full product specifications
Vertiv NetSure 731 CC2 Indoor Cabinet DC Power System (-48V 600A/900A Telecom Central Office Rack) - Official Front View

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Rated System Output Capacity
48Vdc / Max 600A - 900A
Rectifier Module Slot Configuration
18x R48-3500/4000 Rectifier Slots
AC Distribution Inputs
Dual 380Vac 3-Phase 5-Wire Auto/Manual ATS
DC Branch Outlets
LLVD and BLVD Two-Stage LVD Disconnects
Central Supervisory Unit
NetSure M830B Touchscreen SNMP/Web Controller
Cabinet Dimensions
2000 × 600 × 600 mm

Alarms & troubleshooting

AC_IN_FAIL / Utility Grid Failure
Input Amber LED flashing, Master Alarm Red solid
Utility power outage, AC voltage outside tolerance (<85Vac or >300Vac), or tripped circuit breaker
1. Measure incoming AC line voltage to verify it has normalized; 2. Confirm that the input breaker on the distribution panel is closed; 3. Once AC grid recovers, the module soft-starts automatically to resume DC output.
DC_OV_LOCKOUT / DC Overvoltage Shutdown
Fault Red LED solid, module completely shut down
Internal voltage feedback loop failure, lightning surge ingress, or severe current-sharing imbalance
1. Probe DC bus voltage with a digital multimeter to rule out external spikes; 2. Open the input breaker, extract the module, wait 30s for capacitor discharge, and reinsert; 3. If overvoltage persists upon power-up, replace the internal control board.
FAN_FAIL_OTP / Fan Failure & Over-Temperature
Temp Amber LED solid, output power derated proportionally
HVAC failure in server room, clogged air intake filters, or seized ball-bearing cooling fan
1. Clean dust accumulation from front-panel intake grilles to ensure unrestricted airflow; 2. Confirm equipment room ambient temperature is maintained under 25°C; 3. Inspect fan rotor for mechanical obstruction; hot-swap replacement fan if seized.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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